590399domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest number of complexity n: smallest number requiring n 1's to build using + and *.at n=44A005520Smallest prime number such that the number of distinct prime factors with multiplicity of its 9's complement is equal to n. If no such number exists, return -1.at n=15A378139Prime numbersat n=48384